Nippers



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NIPPERS.

No. 368,470. Patented Aug. 16, 1887.

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NIPPERS.

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UNITED STATES PATENT OFFICE.

HENRY HAMMOND, OF NEWV HAVEN, CONNECTICUT.

NIPPERS.

SPECIFICATION forming part of Letters Patent No. 368,470, dated August16, 1887.

Application filed August 16, 1886. Serial No. 210,961. (Model) T0 aZZwhom it may concern:

Be it known that I, HENRY HAMMOND, of New Haven, Connecticut, haveinvented a new and useful Improvement in \Vire-Nippers and Pliers, ofwhich the following description and claim constitute the specification,and which is illustrated in the accompanying two sheets of drawings.

This invention relates to nippers for cutting wire and to pliers forclasping small objects, and it is also applicable to other analogousimplements.

Figure 1 is a side view of an implement containing my invention, andFig. 2 is an edge view of the same. Figs. 3 and 4 are fragmentary sideviews of the same with one of the exterior parts removed. Fig. 5 is afragmentary view of still fewer parts of the implement. Fig. 6 is acentral longitudinal section on theline m m of Fig. 1. Figs. 7, 8, and 9are perspective views of certain pieces of the implement. Fig. 10 is aview identical with Fig. 8, except that it shows a modified form ofcertain of the interior parts of the instrument.

A and B are levers of the first order,and constitute the handles of thetool.

C and D are other levers of the first order, and constitute the workingparts of the implement.

E and F are flanged plates.

G and H are cylindrical studs integral with the plate F.

I and J are screws tapped into those studs, respectively, and holdingthe plate E firmly down upon the tops thereof, so as to bind all partsof the instrument together.

K is a spring fixed around the stud H in grooves cut into the adjacentsurfaces of the disk-like parts of the leversA and B.

L is a set-screw, adjustable to limit the mutual approach of thoselevers.

M and N are protuberances extending from the plates E and F,respectively, to positions between the levers A and B.

O and P are recesses, which constitute the working-points of the leversA and B, respectively. Q and R are protuberances extending into thoserecesses, respectively, and constituting the powcr-points of the leversC and D, respectively.

The modification in Fig. 10 consists in placing protuberances, insteadof recesses, at the working-points of the levers A and B, and fittingthose protuberances to recesses in the lower ends of the levers C and D,respectively.

The levers A and B have the stud H for their common fulcrum, and thestud G is the common fulcrum for the levers C and D.

The mode of assembling the parts of the implement is readily understoodfrom the foregoing description and the accompanying drawin s.

The mode of operation is as follows: The wire to be cut, or the articleto be clasped, being placed between the working edges of the levers Cand D, the user of the tool clasps the levers A and B and forces them tomutually approach, thus turning them upon their fulcrum, and causingthem to force the powerpoints of the levers C and D apart, and theirworking edges together to the accomplishment of their function ofcutting or pinching, as the case may be. \Vhen theimplementis clasped inthe hand, the protuberances M and N fill the spaces between the outerborders of the nearest opposing surfaces of the levers A and B, and thusprevent the plates E and F and the levers C and D from moving relativelyto the levers A and B. WVhen the last-mentioned levers are forced mostwidely apart by the spring K, that relative movement is prevented by theclosure of the joints S, T, U, and V, as shown in Figs. 1, 2, and 3. Theproportions of the levers may be varied to the requirements ofparticular cases, and the forms of sundry of the parts may be changed tosuit the preference of the constructor; but I prefer the forms shown inthe drawings.

I claim as my invention- The combination of the levers A and B, each ofthem being provided with a disk-like part, the circumferences of whichtwo parts are substantially coincident, and the centers of which turnupon one fulcrum, and the levers C and D, each of them being providedwith a disk like part, the outlines of which parts are substantiallycoincident, and the centers of which turn upon one other fulcrum, thefour levers being so constructed and combined that the movement eitherway of the lever Awill work the lever C, and the movement either way ofthe lever B will work the lever D, all substantially as shown anddescribed.

HENRY HAMMOND.

XVitnesses:

ALBERT H. WALKER, THO. J. VAIL.

